DELTA 1 DEB, 42639

Orbit data source: Space-Track

DELTA 1 DEB, 42639 is space debris in SSO originally from a launch on Thu, 12 Jun 1975 UTC launched from the Air Force Western Test Range (AFWTR). Debris objects in space refer to the collection of defunct objects orbiting the Earth. Examples of debris include non-operational satellites, rocket bodies, and fragments generated from explosions, collisions, or faulty payload assembly.

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Iframe URL

https://www.satcat.com/sats-embedded/42639?theme=dark&initialShowStats=false

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ISO8601 Format

Identifier

42639, 1975-052LY

Orbit

SSO

Country

Related business

National Aeronautics and Space Administration (NASA) (US)

Manufacturer

Unknown

Mission

Spacecraft

Bus & Motor

Unknown

Mass

Unknown

Launch date (UTC)

1975-06-12 (51 years ago)

Launch vehicle

Unknown

Launch site

Air Force Western Test Range (AFWTR)

Object type

Payload

Rocket body

Debris

Shape & HBR

Unknown shape, 0.1 m

Radar Cross Section

Small (<0.1 m²)

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Last TLE update: 12 hours ago

TLE from 12 hours ago

0 DELTA 1 DEB
1 42639U 75052LY  26242.31021272  .00000014  00000-0  11462-3 0  9999
2 42639  99.7000  59.0523 0070492 209.7742 274.6423 13.31703251620673

Epoch: 2026-08-30T07:26Z

TLE epoch observation values (Epoch: 2026-08-30T07:26:42.379Z)

Latitude

55.27273°

Longitude

163.07068°

Altitude

1,145.493 km

Speed

7.287 km/s

True Right ascension

16h 53m 01s

True Declination

55° 07' 11"

Sunlit

Object was in daylight at epoch

Visualization orbit readout

Latitude

Unknown

Longitude

Unknown

Altitude

Unknown

Speed

Unknown

Apparent Right ascension

Unknown

Apparent Declination

Unknown

Sunlit

N/A

Visualization observer readout

Local Sidereal Time

11:04:49

Azimuth

Unknown

Elevation

Unknown

Doppler factor

Unknown

Orbital elements

Apogee altitude

1,190.652 km

Perigee altitude

1,084.691 km

Semi-major axis

7,515.808 km

Eccentricity

0.00705

Inclination

99.7°

RAAN

59.0523°

Arg. of periapsis

209.7742°

True anomaly

273.83662°

Mean anomaly

274.6423°

Eccentric anomaly

274.23952°

Mean motion

3.33104 °/min

Orbital period

108.07 mins

BSTAR

0.00011462

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Other satellites on launch #52 in the year 1975 (1975-06-12 UTC)

DELTA 1 DEB, 21374

DELTA 1 DEB, 21448

DELTA 1 DEB, 21340 (Decayed)

DELTA 1 DEB, 21464

DELTA 1 DEB, 21508 (Decayed)

DELTA 1 DEB, 37628 (Decayed)

DELTA 1 DEB, 21969

DELTA 1 DEB, 35535

DELTA 1 DEB, 21376 (Decayed)

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DELTA 1 DEB Visibility forecast

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Span	Click to sort rows by Start time (UTC) header in descending order	Start Az.	Max El. time (UTC)	Max El. Az.	Max El.	End time (UTC)	End Az.
11 mins	2026-08-30 23:40:16.981Z	38.289° NE	2026-08-30 23:46:16.981Z	101.619° ESE	25.13°	2026-08-30 23:51:16.981Z	151.188° SSE
11 mins	2026-08-31 01:27:16.981Z	0.745° NNE	2026-08-31 01:32:16.981Z	300.888° NW	37.274°	2026-08-31 01:38:16.981Z	221.494° SW
7 mins	2026-08-31 10:04:16.981Z	82.28° E	2026-08-31 10:07:16.981Z	52.251° ENE	17.736°	2026-08-31 10:11:16.981Z	17.062° NNE
12 mins	2026-08-31 11:47:16.981Z	165.536° S	2026-08-31 11:52:16.981Z	199.238° SSW	44.842°	2026-08-31 11:59:16.981Z	344.494° N
5 mins	2026-08-31 13:38:16.981Z	256.47° W	2026-08-31 13:40:16.981Z	274.723° WNW	13.715°	2026-08-31 13:43:16.981Z	300.341° NW

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Co-orbital & Co-planar RSOs

Thresholds — Semi-major Axis: ±100 km, RAAN: ±3°, Inclination: ±5°
TCA is derived from TLE conjunctions

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CAUTION: Conjunctions in this section are generated from low-fidelity TLE screenings

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Check out DELTA 1 DEB, 42639 on other resources

View DELTA 1 DEB, 42639 on Heavens-Above

View DELTA 1 DEB, 42639 on Keep Track

View DELTA 1 DEB, 42639 on Celestrak

View DELTA 1 DEB, 42639 on Gunter's Space Page

Satcat and Kayhan Space are not affiliated with NASA, Celestrak, Heavens-Above, Keep Track, or Gunter's Space Page.

DELTA 1 DEB, 42639

Orbit data source: Space-Track

Expand to show TLE details & historyLast TLE update: 12 hours ago

TLE from 12 hours ago

TLE epoch observation values (Epoch: 2026-08-30T07:26:42.379Z)

Visualization orbit readout

Visualization observer readout

Orbital elements

Other satellites on launch #52 in the year 1975 (1975-06-12 UTC)

DELTA 1 DEB Visibility forecast

Co-orbital & Co-planar RSOs

Check out DELTA 1 DEB, 42639 on other resources

Documentation

Expand to show TLE details & history
Last TLE update: 12 hours ago